Retractable needle-safety blood sampling device

ABSTRACT

A safety device is presented for securely stowing a double sharp-ended needle. The device comprises a tubular adapter with a longitudinally-elongated channel. A needle holder is located in the channel to move from a distal orientation, in which one needle end projects from a distal adapter opening, and a proximal orientation, in which both needle ends are enclosed within the adapter body. A top plate transitions from a distal orientation, in which the plate is distal from a proximal adapter opening, and a proximal orientation, in which the top plate obstructs the proximal adapter opening. An actuator plate is attached to the adapter body to transition from a first position where the actuator plate retains the needle holder and top plate in distal orientations, and a second position where the needle holder and top plate move to proximal orientations.

CLAIM OF PRIORITY AND CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of and priority to U.S. ProvisionalPatent Application No. 61/162,096, filed on Mar. 20, 2009, the contentof which is incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates generally to hypodermic needles. Inparticular, the present invention relates to hypodermic needle devices,for collecting samples of blood or other body tissues, that conceal thesharp point(s) of the hypodermic needle following use.

BACKGROUND OF THE INVENTION

A hypodermic needle is a sharp, hollow needle intended to penetrate orpuncture the skin, mucous membrane, and internal organs of humans oranimals for insertion or removal of fluids, aerosols, or particulatesuspensions. The hypodermic needle is commonly used with a syringe toinject substances into the body or extract fluids from the body. Suchneedles may also be used to take liquid samples from the body, e.g., fortaking blood from a vein in venipuncture.

When a hypodermic needle enters a patient's body, it is invariablycontaminated by the patient's blood, body fluids, etc. Following use ofthe syringe, the hypodermic needle presents a risk to the administeringand assisting physicians, nurses, and other health care personnelbecause the needle might transmit an infection or disease to suchpersonnel if it were to accidentally puncture them. Others susceptibleto accidental needle punctures include sanitation workers who laterdispose of garbage containing the hypodermic needles. Often, theaccidental needle puncture may be so trivial that it remainsunrecognized and, thus, untreated until more serious side effects becomeapparent.

Both healthy and sick people are subject to diagnostic blood drawing,while only sick patients typically receive therapeutic injections. Sincethere are more healthy people than sick ones, the incidence ofaccidental needle stick injuries and microbial disease transmissioncaused by blood drawing devices far exceeds that caused by syringes usedfor therapeutic injections given to sick persons. In addition, becausethe needles used for drawing blood have sharp puncturing points on bothends, in contrast to therapeutic syringe needles with a single sharpend, the chance for needle stick injury is normally higher with blooddrawing devices.

Automatic retraction of post-use sharp points by hypodermic syringeassemblies with safety engineered devices is an effective way to guardagainst accidental needle sticks and inadvertent microbial transmission.Heretofore, simple, inexpensive and effective retraction mechanisms havenot been made available or adaptable for blood drawing devices. This isespecially so because the double-ended needle poses special problems.For instance, when such retraction devices are applied to dual-pointhypodermic needles, retraction of the distal sharp end often results inprojection and injury potential of the proximal sharp end. Further, theneedle may be screwed to the end of the barrel, which makes retractionof the needle difficult or impossible.

The Design Criteria

Improved engineering controls are often among the most effectiveapproaches to reducing occupational hazards, and therefore are animportant element of a needle stick prevention program. Such controlsinclude eliminating the unnecessary use of needles, and implementingdevices with safety features. A number of sources have identified thedesirable characteristics of safety devices [OSHA 1999c; FDA 1992;Jagger et al. 1988; Chiarello 1995; Quebbeman and Short 1995; Pugliese1998; Fisher 1999; ECRI 1999]. These characteristics include thefollowing:

-   -   The device is needleless.    -   The safety feature is an integral part of the device.    -   The device preferably works passively (i.e., it requires no        activation by the user). If user activation is necessary, the        safety feature can be engaged with a single-handed technique and        allows the worker's hands to remain behind the exposed sharp.    -   The user can easily tell whether the safety feature is        activated.    -   The safety feature cannot be deactivated and remains protective        through disposal.    -   The device performs reliably.    -   The device is easy to use and practical.    -   The device is safe and effective for patient care.

Although each of these characteristics is desirable, some are notfeasible, applicable, or available for certain health care situations.For example, needles will always be necessary where alternatives forskin penetration are not available. Also, a safety feature that requiresactivation by the user might be preferable to one that is passive insome cases. Each device must be considered on its own merit andultimately on its ability to reduce workplace injuries. The desirablecharacteristics listed here should thus serve only as a guideline fordevice design and selection.

In light of the foregoing, significant inventive efforts have beendevoted to concealing the sharp point(s) of hypodermic needles. One sucheffort is described in U.S. Pat. No. 5,338,311, entitled “HypodermicNeedle Assembly,” which issued to the inventor of the present inventionon Aug. 16, 1994. A needle-syringe assembly is presented with a needleholder carrying the hypodermic needle on a distal end thereof. Theneedle holder is slidably mounted in a coaxial cavity of the plunger. Toretract the needle, a taper lock is disengaged by rotary movement of theplunger relative to the barrel. While preventing rotation of the needleholder relative to the barrel, continued rotation of the plunger causesa lateral arm of the needle holder to ascend through a helical slot inthe plunger so that the needle holder retracts into the coaxial cavityof the plunger and the needle is concealed inside the barrel. A similardevice is disclosed in U.S. Pat. No. 5,514,100, entitled “HypodermicNeedle Assembly,” which issued to the inventor of the present inventionon May 7, 1996.

Other devices include the Punctur-Guard™ device, manufactured byBio-Plexus, Inc., of Ventura, Calif., USA. In this device, a coaxialtube is inserted inside the post-use hypodermic needle, projectingbeyond the sharp point. This avoids the puncture of the skin by sharpbevel, but does not prevent scratching and microbial transmission.

A cap activated device is disclosed in U.S. Pat. No. 5,810,775 (RE39107), to Shaw, which is entitled “Cap Operated Retractable MedicalDevice.” In Shaw, a spring is installed in a compressed state under aneedle carrier by a tapered co-axial sleeve inside an adapter. When thecover of the adapter is closed, an inner co-axial tube is pushed down torelease the needle carrier, allowing the spring to expand and retractthe needle carrier into the adapter tube. The Shaw device has manydisadvantages. First, the needle is free and likely to fall off when thecap is opened. In addition, the opening at the bottom of the adaptertube remains open, and there is a potential for aerosolization ofcontaminated blood upon retraction.

Other attempts have been made to resolve the needle stick problem, but asatisfactory solution is still not available. By way of example, in U.S.Pat. No. 5,070,885, to Bonaldo, which is entitled “Disposable BloodCollection Device”, a movable carrier for the double-ended needle isinstalled within an adapter. The carrier is accessible from outside theadapter via a manual switch that extends through a longitudinal slot onthe adapter. The manual switch allows an operator to force the needlecarrier proximally, permitting retraction of the needle. Similarly, U.S.Pat. Nos. 4,813,426, to Haber et al., and 4,892,107, to Haber, alsoinstall a needle carrier sleeve that is accessible and controlledthrough a longitudinal slot on the adapter wall, and is controlledmanually or by a spring.

U.S. Pat. No. 4,904,242, to Kulli, provides an internal anchor for adouble-ended needle, and retracts the needle with an extension spring.U.S. Pat. No. 4,984,580, to Wanamaker, provides a concentric chamber inthe nozzle area of the adapter to accommodate the hub of a double-endedneedle. Wanamaker's hub is encircled by a compression spring. A springrelease mechanism, which is accessed by a window close to the nozzle,retracts the needle when actuated.

A needle device and method of use are described in U.S. Pat. No.5,193,552, to Columbus, wherein the needle moves out of and into aprotective housing, between two operative positions, one of which causesthe housing to shield the needle. Each operative position includesreleasable locking detents that operate to temporarily hold the needlein one of the positions, the holding force of one detent being less thanthat of the other. A third position beyond the one that shields theneedle in the housing is used to permanently lock the needle in thehousing against accidental reuse. The needle device can be used with ablood collection container or a syringe drug delivery container, eachone releasably mating with the device during use.

U.S. Pat. No. 6,869,415 B2, to Asbaghi, provides a protective guard thatautomatically covers the needle after a blood collection procedure hasbeen completed. Prior to the procedure the guard member is restrained onthe device in a proximal position to expose the needle, and to therebyfacilitate insertion of the needle into a vein of a patient. When ablood collection vial is engaged with the device, the guard member isreleased to move distally over the needle. As the needle is beingwithdrawn from the patient, the guard member automatically covers theneedle.

U.S. Pat. No. 7,357,783 B2, to Millerd, also describes a bloodcollection device wherein the entire double-ended needle is pulled intoand covered by an adapter. Initially, the needle assembly is advancedand the vein-puncturing needle is exposed to collect blood. Anotherneedle guard remains anchored to the proximal sample-collecting end ofthe double-ended needle. When a collection tube is forced on the innersample-collecting end, the latch is released and advances to cover thevein-puncturing needle. At the end of the procedure thesample-collecting sharp end is still bare to cause contaminated needlestick.

U.S. Pat. Nos. 5,346,480, to Hess et al., 5,292,314, to D'Allessio etal., 5,049,136, to Johnson, 4,923,447, to Morgan, and 4,170,993, toAlvarez, are other examples of needle cover devices. Most currently useddevices simply cover the external venipuncture tube by a hinged sheathor retracting needle, while leaving the tube-puncturing sharp pointexposed and unsafe. In addition, most of the currently available devicesare expensive, and are not inherently safe. Many still have thepotential of causing accidental needle punctures and microbialtransmission. Most must be disposed of in sharps containers, whichincreases cost, and sharps containers are not available or affordable to¾ of the world population.

SUMMARY OF THE INVENTION

One object of the present invention is to provide an inexpensive,easy-to-use, fully-integrated, and precision-engineered safety adapterdevice for a blood-drawing double-ended hypodermic needle.

Another object of this invention is to provide an engineered safetyblood-drawer adapter device that, upon completion of collection ofsamples and upon voluntary actuation by a user, retracts the doublesharp-ended hypodermic needle, and secures it in a totally enclosed,individual, tamper-proof container.

An additional object of this invention is to conveniently locate theactuation point with respect to the grip surface of the blood-drawer,and locate the actuation point well behind the needle body.

One more object of the present invention is to utilize a conventionaldouble-ended hypodermic needle whose one puncturing end enters into avein, while the opposing end punctures the rubber stopper to transmitthe sample into a vacuumed tube. The size, shape, and structure of theblood drawer needle, as well as its operation, are conventional in manyrespects, except that the adapter is uniquely designed to accept andconceal the entire length of the double-ended needle.

An additional object is to permit healthcare personnel to use the sameblood sampling method, the same double-ended needle, and the same sampletube they have been comfortably using for years, but may be prohibitedfrom using in their present state due to changes in the law and safetyconcerns. The objective is to resolve the safety concerns so that thesame inexpensive method of blood sampling and convenience is availableagain. Accordingly, the safety device of the present invention, althoughstructurally different and unique, may be used in exactly the same wayas other conventional devices which have been used for years,eliminating the need for special training on the part of the user.

It is another object of this invention that the adapter tube engagingthe double ended needle be engineered and lengthened to retract bothsharp ends of the double ended needle inside the lengthened body of theadapter, and completely conceal the needle by closing both ends of theadapter tube. This design adds internal safety features to make it safe.

It is yet another object of this invention that the safety mechanism betamper proof, and the device be inherently safe, meaning that it has nopotential of post use puncturing of skin and logically no need ofrequiring disposal in a sharps container for the second time.

Another object of this invention is to present an adapter that is itselfan automatic safe and tamper proof container configured to retract andsecurely lock a double-ended sharp hypodermic needle after use, andsecurely close both ends of the adapter on a simple push of an actuatorplate, eliminating any potential to cause needle stick injuries afteruse.

Another object of this invention is to provide a safety device whereinthe primary functional components are inseparable from the deviceassembly. Otherwise, in the event of real necessity, the functionalityof the device may not be available.

According to one embodiment of the present invention, the safety adapterincludes four plastic disks or plates—a top plate, a needle holderplate, an actuator plate, and a bottom plate, along with two specialtysprings. This permits the device to be made at relatively modest cost,which is a major concern for the healthcare industry.

In accordance with another embodiment, the retraction mechanism isactuated at the back end of the puncturing needle by a lateral touch ona locking plate, as required by NIOSH and OSHA. In this instance, thesafety device instantly retracts the hypodermic needle, and closes theopening. The dangerous double-ended sharp needle is totally andpermanently enclosed in a rigid, puncture resistant, lengthened, plasticadapter tube, with both ends of the tube mechanically closed.

As part of yet another facet of the disclosed concepts, the needle, whenin a retracted state, is held in a concentric orientation with respectto the central axis of the adapter tube, with neither of the sharppoints making contact with the sides or end enclosures of the tube.

According to another aspect of this invention, the mechanical closure ofthe distal end prevents reactive aerosolization prevalent in otherretractable needle devices. The short end of the needle does notgenerate aerosolization because the intra-luminal inertia of the fluidis in the opposite direction. A square opening in the proximal plate hasa generally square shape that allows, for example, rotation of the platefor engagement and alignment with other components.

The above features and advantages, and other features and advantages ofthe present invention, will be readily apparent from the followingdetailed description of the preferred embodiments and best modes forcarrying out the present invention when taken in connection with theaccompanying drawings and appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective-view illustration of a hypodermic needle safetydevice in accordance the present invention, showing the sample-intakeend of a double-ended hypodermic needle in an extended position, and avacuum tube for collection of fluid samples positioned for mating withan opposing sample-output end of the hypodermic needle;

FIG. 2 is an exploded, plan-view illustration in partial cross-sectionof a hypodermic needle safety device in accordance with the presentinvention;

FIG. 3 is a plan-view illustration in partial cross-section of ahypodermic needle safety device in accordance the present invention,including cross-sectional views of an attached double-ended needle, aswell as that of an attached fluid-sample collection tube;

FIG. 4 is a rear-view illustration of the hypodermic needle safetydevice of FIG. 3, taken in partial cross-section along line A-A;

FIG. 5 is a front-view illustration of the hypodermic needle safetydevice of FIG. 3, taken in partial cross-section along line B-B;

FIG. 6 is a side-view illustration of the hypodermic needle safetydevice of FIG. 3, taken in partial cross-section along line C-C;

FIG. 7 is an exploded, perspective-view illustration of a hypodermicneedle safety device in accordance with the present invention;

FIG. 8 is a perspective-view illustration of an exemplary needle holderor adapter in accordance with the present invention;

FIG. 9 is a rear-view illustration of the needle holder of FIG. 8;

FIG. 10 is a side-view illustration of the needle holder of FIG. 8,taken in partial cross-section along line D-D of FIG. 9;

FIG. 11 is a front-view illustration of the needle holder of FIG. 8;

FIG. 12 is a perspective-view illustration of an exemplary top plate inaccordance with the present invention;

FIG. 13 is a front-view illustration of the top plate of FIG. 12;

FIG. 14 is a side-view illustration of the top plate of FIG. 12, takenin partial cross-section along line E-E of FIG. 13;

FIG. 15A is a side-view illustration of a first biasing member inaccordance with the present invention, shown in a compressed state;

FIG. 15B is a side-view illustration of the first biasing member of FIG.15A, shown in an expanded state;

FIG. 16 is a perspective-view illustration of an exemplary needle holderplate in accordance with the present invention;

FIG. 17 is a front-view illustration of the needle holder plate of FIG.16;

FIG. 18 is a side-view illustration of the needle holder plate of FIG.16, taken in partial cross-section along line F-F of FIG. 17;

FIG. 19A is a side-view illustration of a second biasing member inaccordance with the present invention, shown in a compressed state;

FIG. 19B is a side-view illustration of the second biasing member ofFIG. 19A, shown in an expanded state;

FIG. 20 is a perspective-view illustration of an exemplary bottom platein accordance with the present invention;

FIG. 21 is a rear-view illustration of the bottom plate of FIG. 20;

FIG. 22 is a side-view illustration of the bottom plate of FIG. 20,taken in partial cross-section along line G-G of FIG. 21;

FIG. 23 is a perspective-view illustration of an exemplary actuatorplate in accordance with the present invention;

FIG. 24 is a side-view illustration of the actuator plate of FIG. 23;

FIG. 25 is a perspective-view illustration of an exemplary double-endedhypodermic needle in accordance with the present invention;

FIG. 26 is a perspective-view illustration of an exemplary retractioncontrol module in accordance with the present invention;

FIG. 27 is a front-view illustration of an exemplary hypodermic needlesafety device in accordance with the present invention, showing anactuator plate in a first position and one end of a double-endedhypodermic needle extending from a distal end of the safety device;

FIG. 28 is a front-view illustration of the safety device of FIG. 27,showing the actuator plate in a second position and the hypodermicneedle retracted into a protective adapter;

FIG. 29 is a front-view illustration of the safety device of FIG. 27,showing the hypodermic needle in a fully retracted position within theprotective adapter and the actuator plate in a third positionirreversibly closing a distal opening in the protective adapter; and

FIG. 30 is a plan-view illustration of an exemplary hypodermic needlesafety device in accordance with an alternate embodiment of the presentinvention, with an outer protective adapter broken away in partialcross-section to show a double-ended hypodermic needle encased in theadapter, with total irreversible closure of both ends of the adapter.

While the invention is susceptible to various modifications andalternative forms, specific embodiments thereof have been shown by wayof example in the drawings and will be described in detail herein. Itshould be understood, however, that the invention is not intended to belimited to the particular forms disclosed. On the contrary, theinvention is to cover all modifications, equivalents, and alternativesfalling within the spirit and scope of the invention as defined by theappended claims.

DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

While this invention is susceptible of embodiments in many differentforms, there are shown in the drawings and described herein in detailpreferred embodiments of the invention with the understanding that thepresent disclosure is to be considered as an exemplification of theprinciples of the invention, and is therefore not intended to limit thebroad concepts of the invention to the embodiments illustrated.

Referring to the drawings, wherein like reference numbers refer to likecomponents throughout the several views, presented in FIG. 1 is aperspective-view illustration of a hypodermic needle safety device at10. The safety device 10 is shown with a first, distal end 14 (e.g.,“sample-intake end”) of a double-ended hypodermic needle 12 protrudingfrom an opening in a distal end of a needle holder 30 (also referred toherein as “adapter”). A fluid-sample collection device, representedherein as vacuum tube 18, is operable to receive and collect fluidsthrough the double-ended hypodermic needle 12. The vacuum tube 18 isshown in FIG. 1 positioned for operative mating with a second, proximalend 16 (e.g., “sample-output end” shown, for example, in FIG. 2) of thehypodermic needle 12. The double-ended hypodermic needle 12 and vacuumtube 18 are optional components, which may be provided separately fromthe safety device 10, or included as a single assembly with the safetydevice 10. Also, the geometry, dimensions, and general configuration ofthe hypodermic needle 12 and vacuum tube 18 may be individually orcollectively modified to meet the particular design requirements of theintended application of the safety device 10.

In the illustrated embodiment, each of the two needle ends 14, 16 has asharp/sharpened tip, respectively designated as 20 and 22 in FIG. 2. Incertain applications of the present invention, the first sharp tip 20 ofthe hypodermic needle 12 may be considered a “puncturing end,” designedto pierce/penetrate human or animal skin, organs, veins, etc. The secondsharp tip 22 may be considered a “distributing end,” designed todistribute fluid samples received by the sample-intake end 14 of thehypodermic needle 12. By way of example, the fluid-sample collectiondevice 18 of FIG. 1 includes a generally cylindrical body 24 with arubber stopper 26 mounted to a distal end of the cylindrical body 24,providing a fluid-tight, vacuum seal. In this instance, thesample-output end 16 of the hypodermic needle 12 is operable to pressinto and puncture the rubber stopper 22 so that the vacuum in the tube18 draws a fluid sample through the needle 12 into the tube 18.

With continued reference to FIG. 1, the needle holder 30 comprises anelongated tubular body 32, which may have a generally oval-shapedlongitudinal cross-section (as shown) or other design (e.g., a circularor elliptical perimeter). The needle holder 30 is provided with optionalraised, serrated external surfaces 34 on opposing portions of the holderbody 32. The serrated surfaces 34 provide an operator with ahigh-friction, non-slip grip during use of the safety device 10. Theneedle holder body 32 may be fabricated as a single, unitary part, ormolded in separate parts that are thereafter assembled. Likewise, theserrated surfaces 34 may be preformed into the needle holder body 32, orprovided as a separate add-on feature that is adhered or otherwiseattached to the holder body 32.

As seen in FIGS. 5 and 9, the needle holder body 32 has at its proximalend a circular opening 36 to provide access for the sample-collection(vacuum) tube 18. In addition, the proximal end of the needle holder 30has a pair of identical tabs or flanges 38 that protrude laterallyoutward from opposite sides of the holder body 32. These tabs 38 providecounter balancing leverage and control for pushing the vacuum tube 18into the needle holder 30, for collection of a sample, and forwithdrawing the tube 18 after obtaining the fluid sample. This processmay be repeated to obtain multiple samples for different tests.

In the illustrated embodiment, the distal end of the adapter tube 30 hasa generally oval-shaped opening 40, which is most clearly visible inFIGS. 4, 7 and 11. The holder body 32 is provided with a plurality ofside windows, such as first and second side windows 42 and 44,respectively, shown in FIGS. 2, 7 and 10. In the illustrated embodiment,the windows 42, 44 are formed through sidewalls of the holder body 32,laterally offset from one another on opposing sides of the adapter tube30 proximal to the distal opening 40. Each side window 42, 44 isconfigured to receive and engage with a respective projection 62, 64 ofa bottom plate 60 (seen in FIG. 2). When both projections 62, 64 areoperatively mated with a corresponding window 42, 44, the bottom plate60 is locked to the adapter tube body 32, and operates to partiallyclose off or otherwise obstruct the oval-shaped opening 40 of theadapter tube 30.

Adjacent the proximal end of the needle holder 30 are two cavities withdetents 46 and 48 (FIGS. 5, 8 and 11). In the illustrated embodiment,the detents 46, 48 project inwardly from opposing sides of the adaptertube body 32. These flexible detents 46, 48 may be molded into thetubular body 32 with an internal memory bend. By way of example, and notlimitation, the detents 46, 48 are designed to selectively lock a topplate 70 (also referred to herein as “hub”) to the proximal end of thetubular body 32 to thereby substantially close off or otherwise obstructthe circular opening 36. When the top plate 70 is forced rearwardly withrespect to the adapter 30 toward the proximal opening 36, as will bedescribed in more detail below, the outer perimeter of the hub base 72engages forward-facing ramp surfaces 45 and 47 (FIG. 6) of the detents46, 48, respectively. In so doing, the detents 46, 48 are deflectedoutwardly so that the top plate 70 can pass from one side to the other.The detents 46, 48 then flex back inwardly to lock the top plate 70 inplace, pinning the top plate 70 between the detents 46, 48 and the innersurface of the adapter tabs 38, securely closing the circular opening36, as seen in FIG. 30.

According to the exemplary embodiment shown, the overall width W1 of theholder body 32, seen in FIG. 4, is larger than the height H1, seen inFIG. 6. While the external dimensions of the adapter 30 are preferablyuniform along the length of the tubular body 32, the internal dimensionsare intentionally made non-uniform. For instance, in the illustratedembodiment, the distal portion of the holder body 32 has a firstlongitudinal cross-section, whereas the proximal portion of the holderbody 32 has a second longitudinal cross-section. By way of example, withcomparative reference to FIGS. 4 and 5, the interior of the distalportion has a generally oval-shaped cross-section (e.g., along lineA-A), while the interior proximal segment of the holder body 32 is madegenerally circular by two diametral internal ribs 52 and 54 (e.g., alongline B-B). The internal geometry of the adapter 30 provides a positivearrest point used to limit the speed and distance of retraction of theneedle holder plate 70. In other words, the non-uniform, internalconfiguration of the tubular body 32 is designed to control the movementof selected constituents of the safety device 10, restricting certainretraction elements at desired positions along the length of the tubularbody 32, as will be explained in detail below. Notably, the length,width, number, and orientation of the diametral ribs may be variedwithout departing from the scope of the present invention.

In some embodiments, the short diameter surface of the tubular body 32,proximal to the distal end thereof, provides an ergometrically smallerangle between the distal end 14 of the hypodermic needle 12 and theobject to be penetrated (e.g., a patient's vein). By way ofclarification, the central axis of the needle puncturing end 14 and avein are preferably at a minimum possible angle to avoid inadvertentdouble puncture of vein walls. Such double puncture may result inbleeding under the skin and hematoma, which may be further exacerbatedby the tourniquet applied to the arm to raise venous pressure. Inaddition, this segment of the adapter body 32 maintains a flat surfacebetween the safety device 10 and the vein underneath. This is also abeneficial position for obtaining multiple samples with minimum movementof the needle 12.

In certain applications of the present invention, predetermined segmentsof the adapter 30, preferably along the short-diameter outer surface ofthe holder body 32, include friction lines to provide a secure hold forinsertion of the puncturing end 20 of the needle 12, for example, into avein or body cavity. As previously noted, the distal portion of theadapter 30 includes raised, serrated surfaces 34 that extend in anarcuate fashion along the outer surface the holder body 32 between majoraxis antipodal points of the oval-shaped cross-section. The serratedsurfaces 34 increase sliding friction between the tubular body 34 and anobject abutting therewith, thereby improving control of the entiresyringe assembly.

Turning briefly to FIG. 25, the safety device 10 is used with adouble-ended hypodermic needle 12. It is desirable that the two ends 14,16 of the needle 12 be formed as a single, unitary body with opposingbeveled edges, and a longitudinally-elongated internal channel (notspecifically called out with reference numbers, but readily apparent inFIG. 25) that spans between, and fluidly connects respective openings inthe puncturing end 20 and the distributing end 22. According to theillustrated representation, a connector 56 is operatively attached tothe hypodermic needle 12 in between the distal and proximal ends 14, 16.The connector 56 may be insert molded to an intermediate section of thehypodermic needle 12 to provide a stable, operative anchoring for theneedle 12. For instance, the illustrated connector 56 has anexternally-threaded male luer hub 57 that operatively mates with (i.e.,screws into) an internally threaded female luer hub 82 of a needleholder plate 80, best seen in FIGS. 16 and 18.

The connector 56 also has a plurality of raised ridges 58 configured toengage with a needle cover (not shown). In the embodiment illustrated inFIG. 25, four ridges 58 project radially outward from a central hubportion 59. The ridges 58 are designed to press-fit into the needlecover, securing the cover to the connector 56. In addition, the ridges58 preferably engage with the needle cover such that the hypodermicneedle 12 may be screwed to the needle holder plate 80 simply bypressing the male luer hub 57 into the female luer hub 82, and rotatingthe needle cover without exposing either of the sharp tips 20, 22. Thedouble-ended needle may be fabricated in multiple sizes. Any dimensionaldisparity may be easily corrected by changing the length of thedouble-ended canola and altering the connector location.

The bottom or distal end of the tube 32 of the adapter 30 issubstantially closed off by a bottom plate 60, which is independentlydepicted in various views in FIGS. 20-22. The bottom plate 60 has agenerally oval-shaped base 61. In preferred practice, the outerperiphery of the base 61 matches the internal shape and dimensions ofthe distal portion of the holder tube body 32. The matching geometrypermits a complementary fit and obligatory alignment of the bottom plate60, as well as proper alignment and engagement of the triangularprojections 62, 64 with the windows 42, 44 at the margins of the holderbody 32. The bottom plate 60 may also be fabricated with elevatedmargins 66 (FIGS. 21 and 22) that extend along the outer perimeter ofthe base 61. These margins 66 are shown in FIG. 22 with chamfers toenter the distal portion of the holder body 32.

In some of the disclosed embodiments, the triangular projections 62, 64are configured as snap fasteners, each having a flexible stem with agenerally triangular head (neither of which is explicitly called out,but both are readily apparent in FIG. 22). When the bottom plate 60 ispressed coaxially into the oval-shaped opening 40 of the tubular body32, the triangular projections 62, 64 flex inward until the head of eachprojection is properly aligned with a respective window 42, 44, at whichpoint the projections 62, 64 straighten, fitting the head into thewindow. Once properly engaged with the windows 42, 44, the head of eachprojection lies within the inner perimeter of the window margins, andthe stem extends along the inside of the tubular body 32. When theprojections 62, 64 are fully engaged, it is practically impossible toseparate the bottom plate 60 from the adapter 30 without breaking thetube 32 or otherwise intentionally disengaging one part from the other.Optionally, for additional safety, the mating margins may be bonded bysolvents or via ultrasonic welding.

The bottom plate 60 has a central aperture 67 with a generally circulargeometry that is configured to receive and pass therethrough slotted,semicircular anchoring bills 74 (see FIGS. 12-14) that project generallyorthogonally from a forward face of the top plate base 72. When thesafety device 10 is in a deactivated state, which may be seen, forexample, in FIG. 1, each anchoring bill 74 also passes through acomplimentary quasi-circular, crescent-shaped opening 86 in the base 84of the needle holder plate 80. At this time, the anchoring bills 74 arecooperatively configured to partially circumscribe the threaded femalehub 82 of the needle holder plate 80. In a similar regard, when thesafety device 10 is in the deactivated state, the top plate 70 pressesagainst and pins the needle holder plate 80 between the top and bottomplates 70, 60 such that the female luer hub 82 portion of the needleholder plate 80 passes through the central aperture 67 in the bottomplate 60. The top plate 70 and, thus, the needle holder plate 80 areretained in the deactivated position through a locking engagementbetween the anchoring bills 74 and an actuator plate 90, which isillustrated separately in FIGS. 23 and 24.

Turning next to FIGS. 20 and 22, the bottom plate 60 has a pair ofopposing, L-shaped clamps 68 that project generally orthogonally fromthe forward or outer surface of the base 61. In the example illustratedin FIG. 20, the clamps 68 are integrally molded with the bottom plate60, and are mirror images of one another. The two clamps 68cooperatively form a channel therebetween, intended for inseparablymounting the actuator plate 90 to the bottom plate 60 and, thus, theadapter 30. By way of explanation, each L-shaped clamp 68 engages anopposing side of the actuator plate 90, pinning the plate 90 between theclamps 68, as can be seen in FIG. 1. Through this engagement, theactuator plate 90 is hinged to the front plate 60 to slide transverselywith respect to the adapter body 32 along the major axis thereof (e.g.,left-to-right with respect to FIG. 1), but is restricted from anylongitudinal movement along the central axis of the body 32 or lateralmotion along the minor axis of the body 32 (e.g., up or down withrespect to FIG. 1).

Referring back to FIG. 2, the safety device 10 further comprises atleast two biasing members, which are represented herein by first andsecond helical, conical compression springs 100 and 102, respectively.In one exemplary embodiment, the first biasing member 100 is configuredto transition from a compressed state, shown in FIG. 15A, wherein thespring 100 is preferably substantially flat due to its tapered, conicalshape, to an expanded state, shown in FIG. 15B. Likewise, the secondbiasing member 102 is configured to transition from a compressed state,shown in FIG. 19A, wherein the spring 102 is preferably substantiallyflat, to an expanded state, shown in FIG. 19B. The two biasing members100, 102 provide the retraction control mechanism (i.e., safety device10) with sufficient force to retract the double-ended hypodermic needle12 quickly and with precision—e.g., maintaining coaxial alignmentbetween the needle ends 14, 16 and the tubular body 32, and controllingthe magnitude of rectilinear travel of the needle 12. In addition, thecollaborative interaction of the two biasing members 100, 102 functionsto move the two sharp ends 20, 22 of the needle 12 to two differentlocations within the adapter body 32, both of which are between rigid,relatively impenetrable plastic end plates (i.e., bottom and top plates60, 70), as depicted, for example, in FIG. 30.

In the embodiment illustrated in FIGS. 3 and 6, the top plate 70selectively anchors the hypodermic needle 12 to the base of the holder30 against the force of the first and second compression springs 100,102. When the top plate 70 is secured at the distal end of the adapterbody 32—e.g., through locking engagement between the anchoring bills 74and actuator plate 90, the top plate 70 compresses and pins the first,proximal spring 100 between the top plate 70 and needle holder plate 80.This same locking engagement also acts to compress and pin the second,distal spring 102 between the bottom plate 60 and needle holder plate80.

In contradistinction, when the actuator plate 90 is activated, asdescribed below, the top plate 70 is released and biased toward theproximal end of the adapter body 32 via the expanding first and secondbiasing members 100, 102. In other words, the top plate is forcedrearward with respect to the adapter body 32 (e.g., toward the top ofFIG. 3 or 6) via serial engagement with the first spring 100, needleholder plate 80, second spring 102, and bottom plate 60. Upon completionof the retraction, the top plate 70 irreversibly locks with the adapterbody 30 (e.g., via flexible detents 46, 48) and obstructs the proximalcircular opening 36 of the tube 32, preventing access to the retracted,proximal end 16 of the double-ended needle 12.

In the illustrated embodiment, the diameter of the rigid, circular topplate base 72 is smaller than the distance between the first and seconddiametral internal ribs 52, 54 (also referred to herein as “barriers”)at the proximal end of the holder tube 32, but is larger than theproximal circular opening 36 of the adapter 30. The thickness of the topplate base 72 is approximately 0.03 inches (0.08 cm), and the marginsare preferably straight and smooth and have enough clearance to permitlinear ascending movement along the interior of the tube body 32. Thetop plate 70 has a central hole 76 (FIGS. 13 and 14) defined through thebase 72. The central hole 76 is intended to permit the second, proximalend 16 of the double-ended hypodermic needle 12 to pass through the topplate 70 (e.g., allowing for puncturing engagement with the rubberstopper 26 of the vacuum tube 18, as seen in FIG. 3). In the exampleillustrated in FIG. 13, the hole 76 has a generally square shape thatallows, for example, rotation of the plate 70 for engagement andalignment with other components.

As previously noted, two symmetrical, semicircular anchoring bills 74project from a forward/bottom face of the top plate base 72. The outersurface of each anchoring bill 74 is provided with a transverseanchoring notch 78 that is configured to lock the top plate 70 to theactuator plate 90. In particular, according to FIGS. 3 and 6, when thesafety device 10 is in the deactivated state, the anchoring bills 74pass through the crescent-shaped openings 86 in the needle holder platebase 84, the central aperture 67 in the bottom plate base 61, and anoblong, dual-diameter slot 92 in the actuator plate 90, which is bestseen in FIG. 23. In this example, the diameter D1 of the semicircularanchoring bills 74 (FIG. 13) is (1) slightly smaller than the diameterD3 of a wide, circular segment 93 (FIG. 29) of the oblong slot 92, toenable the free end portions of the bills 74 to pass through theactuator plate 90, and (2) larger than the diameter D2 of the narrow,circular segment 91 (FIG. 29), to allow mating engagement of theanchoring bills 74 with the actuator plate 90 along opposite edges ofthe slot 92. By way of clarification, and not limitation, the anchoringnotches 78 receive opposite edge portions of the narrow segment 91 ofthe slot 92 to latch the bills 74 to the actuator plate 90, and thus tothe bottom plate base 61, while permitting transverse sliding movementof the actuator plate 90. When the actuator plate 90 is operativelyengaged with the anchoring bills 74, the top plate 70 is restricted fromascending axial movement toward the proximal end of the adapter 30. Theanchoring bills 74 can be unlatched from the actuator plate 90 bysliding the actuator plate 90 transversely with respect to the adapter30 (e.g., left to right as viewed in FIG. 3), bringing the wide segment93 of the slot 92 into register with the bills 74, thereby permittingupward movement of the top plate 70 by the upward force applied to thetop plate 70 by the first and second biasing springs 100, 102.

Referring briefly to both FIGS. 3 and 26, the inseparable actuator plate90, installed on the bottom plate 60 of the holder 30, selectively locks(1) the first biasing member 100, (2) the needle holder plate 80, (3)the second biasing member 102, and (4) the top plate 70, to the bottomplate 60 to form a secure and compact assembly.

The actuator plate 90 preferably comprises a generally rectangular,planar body 94 with rounded ends and integrally molded functionalfeatures. The height H2 of the actuator plate body 94 (FIG. 29) ispreferably smaller than the height H1 of the adapter tube 32 (FIG. 6).The thickness T of the actuator plate body 94 (FIG. 24) is designed tosnugly fit the plate 90 in the channel formed by the two molded L-shapedclamps 68 of the bottom plate 60. The opposing long margins 96 of theactuator plate body 94 have chamfered edges 97 that compliment and slidealong a sloping forward geometry of the L-shaped clamps 68, which easespressing of the actuator plate 90 through the clamps 68 into the channelformed between the two clamps 68. Once engaged, the actuator plate 90can only move laterally (e.g., left to right as viewed in FIG. 3), andcannot be disengaged or removed from the bottom plate 60 or the holdertube 32. The laterally offset short margins 98 have raised, roundededges that are elevated and textured to provide a surface to move theplate back and forth in a lateral direction on either side, along thebottom plate of the holder. An added benefit of the raised edges is thatonce engaged, the tubular body 32 limits the transverse movement of theactuator plate 90 so that it can only be pushed until one of the raisededges 98 contacts a side of the adapter 30.

In the illustrated embodiment of FIGS. 27-29, the wide segment 93 of theoblong slot 92 has a circular geometry coincident with and identical tothe central aperture 67 of the bottom plate 60. At the level of theactuator plate 90, the anchoring bills 74 of the top plate 70 havenotches 78 that lockably mate with the narrow segment 91 when theactuator plate 90 is pushed off-center (e.g., to the left as viewed inFIG. 3) until the raised edge of the short margin 98 closest to thenarrow segment 91 contacts the holder tube 32. When the narrow segment91 is operatively aligned with the central aperture 67 of the bottomplate 60, an inwardly-projecting detent 95 (FIG. 25) selectively abutsthe outer perimeter of tubular body 32 distal end, thereby preventinginadvertent movement of the actuator plate 90 without an active effortto unlock the same by an operator. When the actuator plate 90 is shiftedto close off the aperture 67, the same inwardly-projecting detent 95also acts to engage the inner periphery of the bottom plate aperture 67,thereby preventing reverse travel of the actuator plate 90.

The exemplary biasing members—i.e., compression springs 100 and 102 ofFIGS. 15A-15B and 19A-19B, respectively—preferably each have 6-10circular coils of non-uniform diameter such that when the springs 100and 102 are in a fully compressed state (respectively shown in FIGS. 15Aand 19A) each coil fits inside the circumference of the adjacent largercoil so that the compressed springs are flat. That is, the springs donot have any significant solid length or vertical height dimension—i.e.,the thickness of the fully compressed spring is no larger than thediameter of the single wire used to make the spring. In one embodiment,the springs 100, 102 expand in a conical or tapered fashion to thelength of approximately 2.6 inches (6.6 cm) to generate an expandingforce of approximately 1.5 pounds or more and elevate the various platesas required to retract the needle 12. Another desirable feature of thesesprings is a single specific apical direction of expansion that requirestheir specific positioning in the device.

Referring back to FIG. 2, the first, proximal spring 100 has a larger,proximally oriented outer diameter D4 of approximately 0.75″ (1.91 cm.),a smaller, distally oriented outer diameter D5 of approximately 0.45″(1.14 cm.), a wire diameter of approximately 0.03″ (0.08 cm.), and afree length of approximately 1.0 in (2.54 cm.). In a similar regard, thesecond, distal spring 102 has a smaller, proximally oriented outerdiameter D6 of approximately 0.5″ (1.3 cm.), a larger, distally orientedouter diameter D7 of approximately 0.8″ (2 cm.), a wire diameter ofapproximately 0.03″ (0.08 cm.), approximately five total active coils,and a free length of approximately 1.85″ (4.7 cm.). Such springs providea force of approximately 1 to 1.5 lbs depending on the exact dimensionsand materials. A weaker spring can be made by keeping all the dimensionsthe same, but reducing the wire diameter.

In the illustrated embodiments, the longer of the two biasingmembers—e.g., the second, distal spring 102 in the exemplary embodimentsof FIGS. 2 and 7—is operatively oriented to retract the longer of thetwo needle ends—e.g., the distal, puncturing end 14 in the illustratedembodiment—into the holder tube 30, ensuring full retraction of thedistal sharp tip 20. The base of the second spring 102 (i.e., thelarger, distally oriented outer diameter segment) may be placed directlyon the bottom plate 60, abutting a rearward-facing surface thereof. Theapex of the second spring 102 (i.e., the smaller, proximally orientedouter diameter segment) encircles the female luer hub 82 of the needleholder plate 80 and, when in the deactivated state, the two semicircularanchoring bills 74 of the top plate 70 that enclose the female luer hub82.

In the fully retracted state, the needle holder plate 80 rests betweenthe expanded first and second biasing members 100, 102, having retractedthe puncturing end 14 of the needle 12 into the rigid holder body 32.The internal, generally oval cross-section of the tubular body 32 (i.e.,the first longitudinal cross-section) permits axial movement of the ovalneedle holder plate 80 within the distal portion of the adapter 30 untilthe puncturing end 14 of the needle 12 is fully retracted under theexpanding force of the second biasing spring 102. The diametral internalribs 52, 54 in the proximal portion of the adapter 30 provide aneffective circular internal configuration (i.e., the second longitudinalcross-section) that continues through the proximal end of the holdertube 32. This configuration permits the circular top plate 70 to travelthe entire length of the holder tube 32 from the fully-advance distalend to the fully-retracted proximal end of the adapter 30, while theoval needle holder plate 80 is stopped at a preselected location betweenthe two ends of the adapter 30 by engagement with the internal ribs 52,54.

The base of the first spring 100 (i.e., the larger, proximally orientedouter diameter segment) may be placed directly against the top plate 70,abutting the forward-facing surface thereof, circumscribing thesemicircular anchoring bills 74 of the top plate 70. The apex of thefirst spring 102 (i.e., the smaller, distally oriented outer diametersegment) abuts a rearward-facing surface the needle holder plate 80. Inthis arrangement, the proximal spring 100 is partially stabilized by thesample-output end 16 of the needle 12. The proximal spring 100 exertssufficient pressure on the top plate 70 to displace the plate 70 pastthe detents 46, 48 and lock the plate 70 at the circular opening 36.

In some applications of the present invention, the end user is providedthe safety device 10 ready for use with the actuator plate 90 in adeactivated and locked position (also referred to herein as “firstposition”), as may be seen, for example, in FIG. 27. It may be desirablethat one end of the actuator plate 90, such as the raised, rounded edgeof the left-most short margin 98 in FIG. 27, contact with the side ofthe holder tube 32. When in the deactivated state, the internallythreaded female luer hub 82 of the needle holder plate 80 is at theproximal end of the adapter 30, sufficiently accessible for receivingthe connector 56 of the hypodermic needle 12. For instance, the femaleluer hub 82 is concentrically oriented within and visible through thecentral aperture 67 of the bottom plate 60 at the end of the holder tube32. In this location, the double-ended hypodermic needle 12 can beeasily screwed to the holder plate 80 and, thus, the safety device 10,such that a sufficient length of the sample-intake end 14 is externallyoriented for collection of fluid samples. By way of explanation, and notlimitation, a healthcare worker can remove a safety cap (not shown) onthe proximal end 16 of the double-ended needle 12, insert the connector56 into the female luer 82, rotate the connector 56 to threadably lockthe needle 12 to the needle holder 80, and remove the needle shieldcovering the distal end 14 of the needle 12 to expose the puncturing end22. The front-end view of the safety device 10 in FIG. 27 shows theattached needle 12 in the center, protruding axially from the distal endof the adapter body 32.

Continuing with the above example, once the needle 12 is properlyattached to the safety device 10, the healthcare worker inserts thepuncturing end 22 of the needle 12 into a patient's vein and attaches afluid-sample collection device to the sample-output end 16 (e.g., thevacuum tube 18 of FIG. 1 is inserted in through the proximal end opening36 of adapter 30, and pushed onto the second sharp tip 22 of the needle12).

After all the required samples are collected, the collection device iswithdrawn and the needle 12 is pulled out of the vein. The user thenpresses on the textured projecting margin of the actuator plate 90—i.e.,the raised, rounded edge of the right-most short margin 98 in FIG. 27.Due to the arrangement of the safety device 10, there is only onepushable end of the actuator plate 90, as the opposing end is restrictedfrom moving by the tubular body 32. Upon pressing the actuator plate 90,the plate 90 shifts the narrow segment 91 off center (e.g., to the leftin FIG. 28), and centrally aligns the wider segment 93 with the bottomplate central aperture 67 (also referred to herein as “secondposition”), as seen in FIG. 28. This releases the semicircular anchoringbills 74 of the top plate 70 and, in so doing, allows the compressedbiasing springs 100, 102 to expand, whereby the safety device instantlydraws the needle 12 inside the tubular body. In addition, the top plate70 ascends to the proximal end of the adapter 30 to secure the opening36. During transit, the top plate 70 displaces and passes over the topof the detents 46, 48. Once the top plate 70 is immediately adjacent theopening 36, reverse travel is restricted because the plate 70 is lockedbetween the rim of the opening 36 and the detents 46, 48.

Continued pushing on the plate 90 will shift the wider, semicircularsegment 93 off center (e.g., to the left in FIG. 28) with respect to thebottom plate central aperture 67 (also referred to herein as the “thirdposition”), which may be seen in FIG. 29. The additional push on theactuator plate 90 closes the opening 67. It may be desirable that theother end of the actuator plate 90, such as the raised, rounded edge ofthe right-most short margin 98 in FIG. 29, contact with the side of theholder tube 32 to limit transverse movement of the actuator plate 90.The actuator plate detent 95 (shown hidden in FIG. 29), which now sitsin the wider, semicircular segment 93 of the oblong slot 92, preventsreverse travel of the actuator plate 90. The device 10 is thuspermanently locked and disabled. There is no potential that either end20 or 22 of the needle 12 can inadvertently puncture or prick anotherperson. The device should therefore not be classified as a sharp devicewhich would otherwise be destined for a sharps container. Instead, thepost-use safety device may be discarded in a standard biological waste(“red bag”), thereby reducing the cost of disposal.

Turning next to FIG. 30, wherein like reference numbers are used toindicate like structure, a plan-view illustration of an exemplaryhypodermic needle safety device 10′ is shown in accordance with analternate embodiment of the present invention. The safety device 10′ isdepicted with an outer protective adapter 30′ broken away in partialcross-section to show a double-ended hypodermic needle 12 encased withinthe adapter 30′. The safety device 10′ is functionally similar to thesafety device 10 of FIG. 1. In the alternative embodiment of FIG. 30,however, the adapter 30′ is modified from the adapter 30 of FIG. 1 toinclude two or more internal, elongated rails 52′ and 54′ that extendthe entire length of the adapter body 32′. In the exemplificationillustrated in FIG. 30, the rails 52′, 54′ are laterally offset from oneanother, protruding inward from antipodal points of the major axis ofthe tubular body oval-shaped cross-section.

The rails 52′, 54′ are intended to offer additional structural integrityfor the adapter body 32′. The rails 52′, 54′ are also configured toengage with complimentary notches 81′ and 83′ on the margins of a needleholder plate 80′ to provide controlled movement and proper alignment ofthe plate 80′ during retraction thereof. In particular, when the needleholder plate 80′ is biased from the distal end toward the proximal endof the adapter 32′ (i.e., via expansion of compression spring 102), thelongitudinal progress of the plate 80′ is halted at a predeterminedretraction limit by a widened segment (or shoulder) 53′ and 55′ of eachrail 52′ 54′. In the illustrated embodiment, for example, the distancebetween the two rails 52′, 54′ at the distal end of the body 32′ issufficiently wide to allow free, unfettered movement of the needleholder plate 80 in the longitudinal direction. However, the shoulders53′, 55′ sufficiently reduce the distance between the two rails 52′, 54′such that the needle holder plate 80′ will engage the shoulders 53′, 55′along a rearward face of the base 81′, restricting any furtherlongitudinal travel.

In contrast, the narrower, circular geometry of the top plate 70 allowsthe plate 70 to continue its full ascent to close the adapter opening36′ and safely secure the needle 12 in the adapter 30′. In other words,the diameter of the top plate base 72 is smaller than the distancebetween the two widened, shoulder segments 53′, 55′; thus, longitudinaltravel of the top plate 70 is unimpeded by the shoulders 53′, 55′.Optionally, the top plate 70 may also be fabricated with complimentarynotches that are shaped, sized, and oriented to engage the rails 52′,54′ to proper alignment of the plate 70 during retraction thereof.

In another alternative embodiment, the adapter body and bottom plate maybe formed as a single unitary part. The open proximal end of the unitarypart may be used to insert and assemble the other interior parts, withthe top plate being deformable to allow it to be pushed through asmaller opening.

The present invention also provides a method of assembling a protectivedevice for securely stowing a double sharp-ended hypodermic needle. Insome embodiments of the present invention, the protective deviceincludes, but is certainly not limited to: (1) a tubular adapter, (2) anactuator plate, (3) a bottom plate, (4) a first compression spring, (5)a needle holder plate, (6) a second compression spring, and (7) a topplate. For efficient and economic assembly, a moving rotary or linearplatform is provided with nests of adapter configuration and an axially,standing vertical steel rod of uniform diameter. The first step includessqueezing and irreversibly engaging an actuator plate to a bottom plateto begin the placement of feeding components on the steel rod. Thecomponents enumerated above are then sequentially and co-axiallyinserted onto the rod in the nest. Once all of the components are fed, avertical pressure press assembles all the components, and a simultaneouspush of the actuator plate locks the various components in a compressed,deactivated state. Insertion engagement of the erect tubular shell withsolvent bonding completes the assembly of the adapter.

While the present invention has been described with reference to one ormore particular embodiments, those familiar with the art to which thisinvention relates will recognize various alternative designs andembodiments for practicing the invention within the scope of theappended claims.

1. A safety device for selectively stowing a needle with a first andsecond sharp ends, the safety device comprising: an elongated bodydefining a longitudinally oriented channel with a first channel openingspaced from a second channel opening; a needle holder configured to matewith and attach to the needle, wherein said needle holder is movablyarranged at least partially in said channel to move between a firstlocation, in which the first sharp end of the needle projects at leastpartially from said first channel opening, and a second location, inwhich both the first and second sharp ends of the needle are enclosedwithin said body between said first and second channel openings; a topplate movably arranged with respect to said elongated body to transitionfrom a first orientation, in which said top plate is distal from saidsecond channel opening, and a second orientation, in which said topplate is proximal to and at least partially obstructs said secondchannel opening; and an actuator plate movably attached to saidelongated body to selectively transition between a first position, inwhich said actuator plate retains said needle holder in said firstlocation and said top plate in said first orientation, a secondposition, in which said needle holder is moved to said second locationand said top plate is moved to said second orientation, and a thirdposition, in which said actuator plate is at least partially obstructingsaid first channel opening.
 2. The safety device of claim 1, furthercomprising a first biasing member engaged with said needle holder andconfigured to selectively bias said needle holder to said secondlocation when said actuator plate is moved to said second position. 3.The safety device of claim 2, further comprising a second biasing memberengaged with said top plate and configured to selectively bias said topplate to said second orientation when said actuator plate is moved tosaid second position.
 4. The safety device of claim 3, wherein saidfirst and second biasing members are springs retained in compressedstates between said actuator plate and said top plate via said actuatorplate when in said first position.
 5. The safety device of claim 4,wherein said first and second biasing members are substantially flatwhen in respective compressed states.
 6. The safety device of claim 1,further comprising a bottom plate operatively attached to said elongatedbody and configured to partially close off said first channel opening.7. The safety device of claim 6, wherein said elongated body defines aplurality of windows, and wherein said bottom plate includes a pluralityof projections each configured to mate with a respective one of saidwindows and thereby rigidly attach said bottom plate to said elongatedbody.
 8. The safety device of claim 6, wherein said bottom plateincludes first and second opposing clamps cooperatively configured toslidably mount said actuator plate to said bottom plate.
 9. The safetydevice of claim 6, wherein said bottom plate defines an apertureconfigured to pass therethrough the first sharp end of the needle whensaid needle holder is in said first location.
 10. The safety device ofclaim 9, wherein said actuator plate includes a detent configured toselectively engage the perimeter of said bottom plate aperture when saidactuator plate is in said third position to thereby restrict reversetravel of said actuator plate.
 11. The safety device of claim 1, whereinsaid elongated body further comprises a plurality of internal barriersconfigured to obstruct movement of said needle holder and thereby retainsaid needle holder at said second location.
 12. The safety device ofclaim 1, wherein said elongated body further comprises a plurality ofinternal longitudinally-elongated rails configured to engage withcomplimentary notches formed in said needle holder, each of said railsincluding a shoulder configured to obstruct movement of said needleholder and thereby retain said needle holder at said second location.13. The safety device of claim 1, wherein said actuator plate includes afirst raised edge configured to engage said elongated body and therebyrestrict movement of said actuator plate in a first direction, and asecond raised edge configured to engage said elongated body and therebyrestrict movement of said actuator plate in a second direction differentfrom said first direction.
 14. The safety device of claim 1, whereinsaid top plate includes a plurality of anchoring bills configured toengage with said actuator plate when in said first position and therebyretain said top plate in said first orientation.
 15. The safety deviceof claim 14, wherein each of said anchoring bills defines an anchoringnotch configured to latch to a respective side of said actuator plate.16. The safety device of claim 14, wherein said anchoring bills protrudegenerally orthogonally from a base of said top plate, each passingthrough a complimentary opening in a base of said needle holder whensaid top plate is in said first orientation.
 17. The safety device ofclaim 1, wherein said top plate defines a hole configured to passtherethrough the second sharp end of the needle when said needle holderis at said first location.
 18. A protective device for securely stowinga double sharp-ended hypodermic needle having a puncturing end forpiercing tissue, a distributing end for piercing a fluid-samplecollection device, and a connector, the protective device comprising: atubular holder defining therein a longitudinally elongated channel witha distal channel opening longitudinally-spaced from a proximal channelopening; a needle holder plate with a female luer configured to receiveand attach to the needle connector, wherein said needle holder ismovably arranged in said channel to transition from a distal location,in which the puncturing end of the hypodermic needle projects from saiddistal channel opening, to a proximal location, in which both thepuncturing and distributing ends of the needle are enclosed within saidholder between said proximal and distal openings; a first springabutting said needle holder plate and configured to selectively biassaid needle holder plate from said distal location to said proximallocation; a top plate movably arranged in said channel to transitionfrom a distal orientation, in which said top plate is distal from saidproximal channel opening, and a proximal orientation, in which said topplate is proximal to and substantially obstructs said proximal channelopening; a second spring abutting said top plate and configured toselectively bias said top plate from said distal orientation to saidproximal orientation; and an actuator plate slidably attached to thedistal end of said tubular holder to selectively transition: from afirst position, in which said actuator plate retains said needle holderin said distal location, said top plate in said distal orientation, andsaid first and second springs in compressed states, to a secondposition, in which said actuator plate releases said needle holder, saidtop plate, and said first and second springs such that said first springbiases said needle holder to said proximal location and said secondspring biases said top plate to said second orientation, and to a thirdposition, in which said actuator plate substantially obstructs saiddistal channel opening.
 19. The protective device of claim 18, whereinsaid top plate, when in said distal orientation, latches to saidactuator plate, when in said first position, and presses against saidneedle holder plate thereby retaining said needle holder plate in saidfirst location.
 20. The protective device of claim 19, furthercomprising a bottom plate rigidly mounted to said tubular holder andpartially closing off said distal channel opening, wherein said firstspring is disposed between said bottom plate and said needle holderplate, and said second spring is disposed between said needle holderplate and said top plate.
 21. The protective device of claim 18, whereina distal portion of said tubular holder has a first longitudinalcross-section, and a proximal portion of said tubular holder has asecond longitudinal cross-section different from said first longitudinalcross-section.
 22. The protective device of claim 21, wherein said firstlongitudinal cross-section provides unfettered longitudinal movement ofboth said needle holder plate and said top plate, whereas said secondlongitudinal cross-section restricts movement of said needle holderplate to said second location but provides unfettered longitudinalmovement of said top plate.
 23. The protective device of claim 21,wherein said first longitudinal cross-section and a base of said needleholder have a complimentary generally-oval shape, whereas said secondlongitudinal cross-section and a base of said top plate have acomplimentary generally-circular shape.
 24. The protective device ofclaim 18, wherein moving said actuator plate to said third positionlocks the double sharp-ended hypodermic needle inside said tubularholder between said top plate and said actuator plate.
 25. Theprotective device of claim 18, wherein said tubular holder furthercomprises a plurality of rails each longitudinally-elongated within saidchannel and projecting inward to engage with a complimentary notchformed in said needle holder plate thereby aligning said needle holderplate for linear movement inside the channel.
 26. The protective deviceof claim 25, wherein each of said rails includes a widened segmentconfigured to engage said needle holder plate during retraction thereofand thereby retain said needle holder at said second location.
 27. Theprotective device of claim 18, wherein said tubular holder furthercomprises a plurality of detents each projecting inward within saidchannel at a proximal end of said tubular holder, said plurality ofdetents being configured to deflect outward during transition of saidtop plate to said proximal orientation and to lock said top plate insaid proximal orientation immediately adjacent said proximal channelopening.
 28. The protective device of claim 18, wherein the hypodermicneedle is coaxially aligned with the tubular holder.
 29. The protectivedevice of claim 18, wherein said tubular holder further comprises a pairof integral flanges projecting transversely from opposing sides of saidtubular holder.
 30. A method of retracting and safely stowing a doublesharp-ended hypodermic needle mounted to a needle holder moveable withrespect to an adapter body of a safety device, the method comprising:moving an actuator plate from a first position to a second position,whereby: a first biasing member forces the needle holder to anintermediate location within the adapter body such that both sharp endsof the needle are inside the adapter body spaced from distal andproximal open ends thereof, and a second biasing member forces a topplate to a proximal end of the adapter body thereby substantiallyobstructing the proximal open end; and moving the actuator plate fromthe second position to a third position, whereby the actuator platesubstantially obstructs the distal open end of the adapter body suchthat both sharp ends of the needle are concealed within the adapterbody. is held vertically straight in the axis of the holder tubepreventing the needle to puncture the wall of holder tube by obliquity.31. A fluid-sample collection device, comprising: a hypodermic needlehaving a sharp puncturing end longitudinally spaced from a sharpdistributing end, and a connector intermediate said puncturing anddistributing ends; a tubular adapter having a hollow body defining achannel with a distal opening longitudinally-spaced from a proximalopening; a first biasing member; a second biasing member; a top platehaving a base with a first diameter smaller than a smallest dimension ofsaid channel and larger than a smallest dimension of said proximalchannel opening, said top plate having anchoring means projecting fromsaid base, wherein said top plate is movably arranged in said channel totransition from a distal orientation, in which said top plate isadjacent said distal channel opening, and a proximal orientation, inwhich said top plate is adjacent and substantially obstructing saidproximal channel opening; a needle holder releasably attached to saidneedle connector, said needle holder having a base defining a pluralityof openings each configured to pass therethrough a respective one ofsaid top plate anchoring means, wherein said needle holder is movablyarranged in said channel to transition from a distal location, in whichsaid puncturing end of said hypodermic needle projects from said distalchannel opening, to a proximal location, in which both said puncturingand distributing ends of said needle are enclosed within said adapterbetween said proximal and distal openings; a bottom plate rigidlymounted to said tubular adapter and partially closing off said distalchannel opening, said bottom plate having a base defining an apertureconfigured to pass therethrough said top plate anchoring means and saidpuncturing end of said needle; and an actuator plate slidably attachedto said bottom plate to move from a first position, in which said topplate anchoring means engage said actuator plate thereby retaining saidneedle holder in said distal location and said top plate in said distalorientation, to a second position, in which said top plate anchoringmeans disengage said actuator plate such that said first biasing memberbiases said needle holder to said proximal location and said secondbiasing member biases said top plate to said second orientation, and toa third position, in which said actuator plate substantially obstructssaid distal channel opening.
 32. The fluid-sample collection device ofclaim 31, wherein said actuator plate includes a planar body defining anoblong slot with a narrow segment and a wide segment.
 33. Thefluid-sample collection device of claim 32, wherein said narrow segmentof said oblong slot aligns with said top plate and attaches to saidanchoring means when said actuator plate is in said first position, andsaid wide segment aligns with said top plate and disengages saidanchoring means when said actuator plate is in said second position. 34.A safety device for selectively stowing a double-ended needle that hasdistal and proximal sharp ends, the safety device comprising: anelongated body defining a longitudinally oriented channel with a distalchannel opening spaced from a proximal channel opening; a needle holderattached to said needle and disposed within said elongated body formovement in said channel between a distal position in which the firstsharp end of the needle projects from said first channel opening, and aproximal position in which both the first and second sharp ends of theneedle are enclosed within said body between said channel openings; atop plate disposed within said elongated body between said needle holderand said proximal channel opening for movement in said channel between adistal position and a proximal position in which said top plate isproximal to and at least partially obstructs said proximal channelopening; and a latching element attached to said elongated body forlatching said needle holder and top plate in said distal positions, saidlatching element being movable to an unlatched position for releasingsaid needle holder and top plate for movement to said proximalpositions; and biasing means within said elongated body for moving saidneedle holder and top plate to said proximal positions in response tomovement of said latching element to said unlatched position.
 35. Asafety device for selectively stowing a double-ended needle that hasdistal and proximal sharp ends, the safety device comprising: body meansdefining a longitudinally oriented channel with a distal channel openingspaced from a proximal channel opening; needle-holding means attached tosaid needle and disposed within said body means for movement in saidchannel between a distal position in which the first sharp end of theneedle projects from said first channel opening, and a proximal positionin which both the first and second sharp ends of the needle are enclosedwithin said body means between said channel openings; a top platedisposed within said elongated body between said needle holder and saidproximal channel opening for movement in said channel between a distalposition and a proximal position in which said top closure means isproximal to and at least partially obstructs said proximal channelopening; and latching means attached to said body means for latchingsaid needle holder and top plate in said distal positions, said latchingmeans being movable to an unlatched position for releasing saidneedle-holding means and top closure means for movement to said proximalpositions; and biasing means within said elongated body for moving saidneedle-holding means and top closure means to said proximal positions inresponse to movement of said latching means to said unlatched position.36. A retraction control module for a blood sampling device having aneedle with first and second sharp ends, the retraction control modulecomprising: a needle holder configured to mate with and attach to theneedle and adapted to be movably arranged in a channel to move between afirst location, in which the first sharp end of the needle projects atleast partially from a first channel opening, and a second location, inwhich both the first and second sharp ends of the needle are enclosedbetween said first channel opening and a second channel opening; a topplate adapted to be movably arranged with respect to said channel totransition from a first orientation, in which said top plate is distalfrom said second channel opening, and a second orientation, in whichsaid top plate is proximal to and at least partially obstructs saidsecond channel opening; a bottom plate configured to partially close offsaid first channel opening; an actuator plate movably attached to saidbottom plate to selectively transition between a first position, inwhich said actuator plate retains said needle holder in said firstlocation and said top plate in said first orientation, a secondposition, in which said needle holder is moved to said second locationand said top plate is moved to said second orientation, and a thirdposition, in which said actuator plate is at least partially obstructingsaid first channel opening; a first biasing member engaged with saidneedle holder and configured to selectively bias said needle holder tosaid second location when said actuator plate is moved to said secondposition; and a second biasing member engaged with said top plate andconfigured to selectively bias said top plate to said second orientationwhen said actuator plate is moved to said second position.
 37. Theretraction control module of claim 36 in which said first biasing memberis located between said bottom plate and said needle holder, said secondbiasing member is located between said needle holder and said top plate,and said top plate, said needle holder and said bottom plate are allheld closely together, compressing both biasing members, by saidactuator plate engaging said top plate.